News articles on climate change

(06/03/2007) The Amazon basin is home to the world's largest rainforest, an ecosystem that supports perhaps 30 percent of the world's terrestrial species, stores vast amounts of carbon, and exerts considerable influence on global weather patterns and climate. Few would dispute that it is one of the planet's most important landscapes. Despite its scale, the Amazon is also one of the fastest changing ecosystems, largely as a result of human activities, including deforestation, forest fires, and, increasingly, climate change. Few people understand these impacts better than Dr. Daniel Nepstad, one of the world's foremost experts on the Amazon rainforest. Now head of the Woods Hole Research Center's Amazon program in Belem, Brazil, Nepstad has spent more than 23 years in the Amazon, studying subjects ranging from forest fires and forest management policy to sustainable development. Nepstad says the Amazon is presently at a point unlike any he's ever seen, one where there are unparalleled risks and opportunities. While he's hopeful about some of the trends, he knows the Amazon faces difficult and immediate challenges.

(05/31/2007) Global warming will put Australia at significantly higher risk of catastrophic bushfires said a leading climate scientists. Speaking at a climate conference in Sydney, Andy Pitman, co-director of the University of New South Wales's climate change research center, said that Australia will face a 100 to 200 percent increase in bushfire vulnerability by 2100 if greenhouse gas emissions aren't curbed.

(05/31/2007) Tropical cyclones and hurricanes play an important role in the ocean circulation patterns that transport heat and maintain the climate of North America and Europe, report researchers from Purdue University.

(05/31/2007) Researchers have constructed a 155,000 record of monsoon history. The findings could help climatologists better understand the impact of climate change on monsoon patterns, which play a critical role in agriculture for hundreds of millions of people.

(05/31/2007) Thursday, President Bush outlined his proposal for reducing greenhouse gas emissions, calling for a series of meetings between the world's largest polluters to establish a global target for emissions reduction. The Associated Press reported that environmentalists quickly dismissed the plan as a "do-nothing" approach, while other critics said the plan comes too late to restore the administration's credibility after years of dragging its feet and outright rejecting action on global warming.

(05/30/2007) HSBC announced Wednesday it would spend $100 million on climate change research. The investment, which will go to the Climate Group, Earthwatch Institute, Smithsonian Tropical Research Institute (STRI) and WWF over a five year period, is the largest donation ever made by a British company.

(05/30/2007) HSBC announced Wednesday it would spend $100 million on climate change research. The investment, which will go to the Climate Group, Earthwatch Institute, Smithsonian Tropical Research Institute (STRI) and WWF over a five year period, is the largest donation ever made by a British company.

(05/30/2007) Greenpeace stepped up the pressure on China to do something about its surging greenhouse gas emissions, launching a campaign that warns melting glaciers could hurt Chinese agriculture and hydroelectric projects. The environmental group cited a Chinese Academy of Sciences' projection that 80 percent of the glaciers in Tibet and the surrounding region could melt by 2035, though other research suggests more moderate melting.

(05/30/2007) Three papers published in this week's issue of the journal Nature debate the proximate causes for the global decline of amphibians, but nonetheless reveal mounting concerns among scientists over the continuing disappearance of frogs, salamanders, and their relatives.

(05/29/2007) The U.S.is responsible for 44% of the annual $50 billion needed to fight global warming said aid agency Oxfam as expectations mount that the United States will reject stiff targets and timetables for reducing carbon dioxide emissions. The U.S. and other G8 nations are meeting next week in Germany to discuss climate change.

(05/28/2007) A team of scientists have found evidence of intense hurricane activity during both cool and warm periods reports The New York Times. The findings suggest that factors other than sea temperature play a role in the formation and intensity of tropical storms.

(05/22/2007) NASA issued a guide to global warming on its Earth Observatory web site, possibly marking a shift for the agency, which in recent years has often skirted use of the term "global warming", famously censoring comments on the subject by James E. Hansen, the director of the agency's Goddard Institute for Space Studies.

(05/20/2007) In a new study, McKinsey&Company, one the world's most respected management consulting firms, reports that the world should be able to cut energy demand growth by half over the next 15 years without compromising economic growth. However it says that market forces along will not drive the transition--targeted policies will be needed to overcome present market failures and policy distortions.

(05/17/2007) An asteroid may have caused the near-extinction of North America's first humans, argues a series of studies to be presented May 24, at the American Geophysical Union's meeting in Acapulco, Mexico. Nature reports that while the theory has been discounted in the past, new research suggests that an comet or asteroid could have exploded above or on the northern ice cap some 13,000 years ago, plunging regional temperatures to plunge for the next 1000 years. The theory would also help explain the disappearance of the continent's large mammals, including woolly mammoths, American lions, and the saber tooth tiger.

(05/17/2007) The apparent increase in infectious disease among coral is likely the result of environmental change and, as such, researchers should focus on understanding the relationship between coral diseases and environmental changes, rather than the diseases themselves, argues a paper published in the August 2007 issue of the Journal of Experimental Marine Biology and Ecology.

(05/17/2007) Climate change has weakened one the Earth's largest natural carbon 'sinks' raising the possibility that increased warming could reduce the capacity of some systems to absorb carbon dioxide, reports a study published this week in the journal Science.

(05/11/2007) A shift towards a drier climate in East Africa may be due to geological changes like the emergence of the Rift Valley, not global climate change suggests research published in the current issue of the journal Nature. Dr. Bonnie Jacobs, Chair of Environmental Science Program at Southern Methodist University (SMU) in Dallas, Texas, reports that the rise of the high Ethiopian plateau may have caused dramatic shifts in the region's vegetation.

(05/10/2007) A University of Colorado at Boulder-led research team tracing the origin of a large carbon dioxide increase in Earth's atmosphere at the end of the last ice age has detected two ancient 'burps' that originated from the deepest parts of the oceans.

(05/10/2007) Scientists have lent support to a plan by developing countries to fight global warming by reducing deforestation rates. Tropical deforestation releases more than 1.5 billion metric tons of carbon into the atmosphere every year, though in some years, like the 1997-1998 el Nino year when fires released some 2 billion tons of carbon from peat swamps alone in Indonesia, emissions are more than twice that. Writing in the journal Science, an international team of scientists argue that the Reducing Emissions from Deforestation (RED) initiative, launched in 2005 by the United Nations Framework Convention on Climate Change, is scientifically and technologically sound, and that political and economic challenges facing the plan can be overcome.

(05/09/2007) Despite its importance to mankind, the global carbon cycle is poorly understood. With concerns over climate change mounting, it becomes all the more imperative to understand how carbon is absorbed by the Earth's oceans, vegetation, and atmosphere.

(05/08/2007) The amount and distribution of above ground biomass (or the amount of carbon contained in vegetation) in the Amazon basin is largely unknown, making it difficult to estimate how much carbon dioxide is produced through deforestation and how much is sequestered through forest regrowth. To address this uncertainty, a team of scientists from Caltech, the Woods Hole Institute, and INPE (Brazil's space agency), have developed a new method to determine forest biomass using remote sensing and field plot measurements. The researchers say the work will help them better understand the role of Amazon rainforest in global climate change.

(05/08/2007) According to two international-research studies on the last ice age, studies with the participation of Dr Rainer Zahn, research professor in the ICREA at the UAB Institute of Environmental Science and Technology (ICTA), before the great ice sheets of the Arctic Ocean began to melt, early sporadic episodes of melting of the old ice sheet which covered the British Isles had already begun to affect the circulation of the ocean currents, which played a key role in the climatic stability of the planet. Based on this observation, scientists consider that the acceleration of the melting of the Greenland ice cap could play an important role in the future stability of ocean circulation and, hence, in the development of climate change.

(05/07/2007) 84 percent of migratory birds have the potential to be affected by climate change warned the United Nations Monday. Lowered water tables, changes in food supplies and prey range, rising sea levels, and increased storm frequency are the greatest threats to birds, said officials with the African Eurasian Migratory Waterbirds Agreement (AEWA) and the Convention on Migratory Species (CMS), two United Nations Environment Programme (UNEP)-led Treaties for the conservation of wildlife.

(05/07/2007) A new study provides further evidence that climate change is adversely affecting coral reefs. While previous studies have linked higher ocean temperatures to coral bleaching events, the new research, published in PLoS Biology, found that climate change may increasing the incidence of disease in Great Barrier Reef corals. Omniously, the research also shows that healthy reefs, with the highest density of corals, are hit the hardest by disease.

(05/07/2007) Tropical plants may be more adaptable to environmental change by extracting nitrogen from a variety of sources, reports a study published in the May 7 early online edition of The Proceedings of the National Academy of Sciences.

(05/04/2007) The Intergovernmental Panel on Climate Change (IPCC) released its long awaiting installment on climate change mitigation, arguing that the costs of offsetting global warming will be much lower than some claim. The IPCC estimates that emissions can be reduced rapidly using existing technology at a cost of 3 percent of GDP, or 0.12 percent per year over the next 25 years, though new technologies could further reduce this cost. While the projections are encouraging, they may be conservative. Some analysts, including the well-respected Amory Lovins of the Rocky Mountain Institute, have calculated that emissions targets that would stabilize the climate could be achieved at no net cost and possibly even a profit. Even McKinsey & Company, a leading management consulting firm, agrees, putting the net cost of reducing emissions by 46 percent at zero.

(05/02/2007) Drought could cause dramatic shifts in rainforest plant communities in Central America, reports a new study published in the May 3 issue of Nature. The research shows that many rainforest plants are ill-equipped to deal with extended dry periods, putting them at elevated risk from changes in climate projected for the region.

(04/30/2007) Despite surviving the age of dinosaurs and numerous bouts of severe climate change, amphibians are not keeping pace with the current rate of global change, reports a new study published in the journal Bioscience.

(04/30/2007) Claiming that costs of fighting global warming will be higher than consensus estimates, China and the United States are fighting plans to slow climate change, according to the Associated Press (AP). The countries also say the impacts of climate change will not be as severe as projected and want to raise the emissions cap of atmospheric carbon dioxide levels from 430 parts per million (ppm) proposed by the European Union to 445 ppm. Current CO2 levels stand around 381 ppm.

(04/30/2007) Climate change could worsen food shortages in Indonesia by delaying the onset of monsoon rains reports a new study published in Proceedings of the National Academy of Sciences (PNAS). The findings suggest that the country could face increasing risk of drought and forest fire if nothing is done to control rising greenhouse gas emissions.

(04/30/2007) Arctic sea ice is melting far faster than previously believed reports a new study published in the May 1 issue of Geophysical Research Letters. A comparison of newly available observational data to advanced simulations reveals that Arctic sea ice has been disappearing about three times faster
than the average rate of loss projected by computer models. The new research, conducted by Julienne Stroeve of the National Snow and Ice Data Center
(NSIDC) and his colleagues, shows that September sea ice extent retreated at a rate of about 7.8 percent per decade during the 1953-2006 period, not the 2.5 percent projected by simulations. The basis for the new data--a combination of satellite measurements and early aircraft and ship reports--is considered more reliable than the earlier records.

(04/26/2007) Earth sits between two worlds that have been devastated by climate catastrophes. In the effort to combat global warming, our neighbours can provide valuable insights into the way climate catastrophes affect planets.

(04/26/2007) Scientists have linked a sharp spike in ocean temperatures 55 million years ago to massive volcanic eruptions that created the North Atlantic Ocean when Greenland and northwestern Europe separated.

(04/25/2007) In an effort to fight greenhouse gas emissions, Canada plans to ban use of incandescent light bulbs by 2012, said Natural Resources Minister Gary Lunn. Canada follows Australia as the second country to announce a ban on the inefficient bulbs. California legislators have proposed a similar ban for 2012.

(04/23/2007) University of Oregon researchers studying mosquitoes have produced the first chromosomal map that shows regions of chromosomes that activate -- and are apparently evolving -- in animals in response to climate change

(04/23/2007) Biodiesel made from rapeseed could increase rather than reduce greenhouse emissions compared to conventional diesel fuels, reports a new study published in the journal Chemistry & Industry. Overall the researchers found that petroleum diesel and rapeseed biodiesel, presently the main biofuel used across Europe, have a similar environmental impact. The results suggest that efforts to mitigate climate change through the adoption of rapeseed biodiesel may be of little use beyond energy security.

(04/23/2007) Climate change may be reducing growth rates of tropical rainforest trees, a development that could have widespread impacts for biodiversity, forest productivity, and even climate change itself, according to new research published in Ecology Letters.

(04/23/2007) Changes in ocean temperature have altered the growth rates of commercially harvested fish over the past century, according to a new study published in this week's early online edition of the Proceedings of the National Academy of Sciences (PNAS).

(04/20/2007) Lemmings, the rodents inaccurately believed to commit mass suicide by jumping off cliffs, are at real risk from climate change reports the Wildlife conservation Society (WCS). The Bronx Zoo-based group has just announced plans to study the impact of global warming on these creatures of the far North.

(04/18/2007) Poison arrow frogs appear to make special effort to avoid exposure to damaging ultraviolet-B radiation, according to research published in the journal Biotropica. The findings are significant in light of increasing levels of UV-B radiation due to ozone depletion.

(04/17/2007) The debate over the impact of global warming on hurricane intensity rages on with a new study published April 18 in Geophysical Research Letters. The research, conducted by Gabriel A. Vecchi of the National Oceanic and Atmospheric Administration (NOAA) and Brian J. Soden of the University of Miami, suggests that an increase in vertical wind shear in the tropical Atlantic and East Pacific Oceans could inhibit the formation and intensification of hurricanes. The authors note that increased vertical wind shear has historically been associated with reduced hurricane activity and intensity.

(04/17/2007) The head of the U.S. Environmental Protection Agency said the 0.8 percent growth in greenhouse gas emissions in 2005 showed the Bush Administration was serious about addressing climate change.

(04/16/2007) Chilling new evidence suggests amphibians may be in worse shape than previously thought due to climate change. Further, the findings indicate that the 70 percent decline in amphibians over the past 35 years may have been exceeded by a sharp fall in reptile populations, even in otherwise pristine Costa Rican habitats. Ominously, the new research warns that protected areas strategies for biodiversity conservation will not be enough to stave off extinction. Frogs and their relatives are in big trouble.

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